Pick and integrate isolated RS485 transceiver

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Possible options:

• ISO1410 - http://www.ti.com/product/ISO1410
• adm2582e - https://www.analog.com/media/en/technical-documentation/data-sheets/adm2582e_2587e.pdf

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Break down of different approaches:

• Fully-integrated solution

  Digikey integrated listing specifies prices, starting from 10$

  • Chip comparison

• Partially integrated

  Digikey isolator listing specifies prices starting from 4$ for a single chip.

  Digikey transiever listing specifies prices starting from 0.5$ for a single chip.

  • Isolator comparison

  • One of the best candidate is ADUM5241ARZ, generic purpose, 1 input, 1 output, some Ali presence and good local price. Around $5

  • Transceiver comparison

  • Decided to go with ST485, as it is a generic module with low local price and pretty good Ali presence.

• Low-integration solution

  TBD

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Application notes:

• ST485 note
• Verbose from AD
• RS485 for beginners

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TVS diode: SM712-02HTG Local store

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Test board made in: 5eca7b48a